Henry Williams offers two types of electro-mechanical treadle switches which provide a safe operational environment throughout the rail infrastructure and are designed to detect train movements and provide signalling control.

Henry Williams hold stocks of and can supply the “Cautor® ” and “Forfex® ” electromechanical detectors commonly used to initiate control primarily for level crossings, signal control, axle counting, depot protection and train wash systems.

The treadle or electromechanical switch provides detection at a given point on the passage of a train or single vehicle travelling at speeds of up to 260 km/hour with either uni or bi-directional control.

Henry Williams after-sales service care is available to extend the life and maintain the high reliability of the treadle switch by refurbishing existing units and replacing all wearing components at a fraction of the new unit cost.

The treadle switches are Network Rail approved and are covered under the following CAT numbers :-


Cautor® 086/046303
Forfex® Std 086/046306
Forfex® A-B 086/046311 Forfex® B-A 086/046318
FBB 086/046316 EU Base 088/092963
Cautor® 086/046300 Forfex® Std 086/046305
Forfex® A-B 086/046310 Forfex® B-A 086/046315
BHB 086/046317


CAUTOR® and FORFEX® are registered trade marks belonging to SNIC RAIL